In the 1990s, Arnold Schwarzenegger
tricked Sylvester Stallone into starring
in Stop! Or My Mom Will Shoot. They
used to have such a fierce rivalry that
they refused to be in the same room,
so Arnold spread a rumor that he was
interested in the part in hopes of getting
Stallone’s attention: “I heard Arnold
wanted to do that movie and after
hearing that, I said I wanted to do it.
He tricked me! He’s always been clever.” Source